I run at 3.5GHz but have watercolling, i did used to use 1.66v @ 3.4GHz with aircooling but was not stable due to the PWR running hot. But they are much cooler now i have watercolling which has allowed me to get stable to 3.5GHz. I run my PC about 8+ hours aday but is rearly left on for more then 24 hours.

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